Bead-setting mechanism



July 14, 1925.

1,545,815 Jqw. DIRKsoN ET AL BEAD SETTING MECHANISM Filed Nov. 16, 1920 5 Sheets-She'et l July' 14, 1925.

l K' 1,545,815l J. w. DmKsoN ET AL .BEAD SETTING MEcHANIsM -Filed Nov. 16', 1920Y 5 Sheets-Sheet' 3 4 .fo-A5.. M/Dir/rsaru. Lee ECZoulfA www July 14, 1925. v l v1,545,815

A J. w. DIRKsoN ET AL BEAD SETTING-MECHANISM I Filed Nov. 1s, 1920 y5 sheets-sheet v4 N fa Il I3 14 Il' i II l ll I vIl I tr/ref :July 14, '1925'.

J; w. vDIRKsoN ETYAL BEAD SETTING MECHANISM Filed Nov. 1e, 1920 5 sheets-sheet v5 Patented J/uly 14, 1925.

UNITED` STATES PATENT OFFICE.,

JOHN w. DIRKSON. or KENT, AND LEE E. OLOUGH,` OE AKRON, OHIO, ASSIGNORS To THE MASON TIRE AND RUBBER coMPANv, OEKENT, OHIO,` A CORPORATION on j OHIO.

READ-SETTING MECHANISML App1ication`,1ed November 16, 1920. Serial NO' 424,445.

To all 4whom t may concern.'

Be it known that we, JOHN W. DTRKsON, a citizen of the United States, residing at Kent, in the county of Portage and State ot Ohio, and LEE E. OLOUGH, acitizen ot. the United States, residing at Akron, in the county of Summitand State Ot Ohio, have invented certain new and useful Improvements in Bead-Setting Mechanism, ot which the following is a specification.

Our invention relates to improvements in bead-setting mechanism, and has for its object the provision of means tor expeditiously applying the beadsto the carcass Or casing of l5 a pneumatic tire The most expeditious method for building the carcasses of tires involves the successive advance of the core whereon the casing is built to different appliances tor performing corresponding constructive Voperations thereon. One of the most important ot theseappliances is the bead-setting mechanism, since the value ot the completed casing depends largely upon the accuracy and strength with which the beads are applied to its inner peripheral edges. In order to apply these heads expeditiously we have ounditnecessary to construct a novel mechanism comprising essentially one or more arms'individually equipped with a contoured bead-setting roll adapted to apply pressure essentially at right angles to the inner peripheral wall or walls ot the tire casing. Sufficient pressure to make the bead stronglyadhere to the oasing and force out all of the air may not be expeditiously applied manually,- and by preterence, we have equipped our improved mechanism with power applying means tor exerting considerable pressure momentarily while the bead is being rolled into position.

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Moreover it is vitally essential'that the beads shall be accurately set upon the tire casing. In ordei'to accomplish this we preterably provide an 'interchangeable or adjustable head, mounting 'the pivoted bead-setting rolls, whichhead inl turn is temporarily l set in proper position by means of an adjustment gauge corresponding to the size ot casing intended to be Operated upon'.- i Further details ofour improvements may be better explained making reference the accompanying drawings wherein:

- Figure l is a front `view ofabead-setting mechanism embodying our invention.

Fig. 2 is a view in side elevation of said mechanism, also showing the tire casing and the bead in process of application, both in fragmentary form.

Fig. 3 is a plan view Of said mechanism i1- 'lustra'ting the tire casing, the beads and core in transverse section, as well.

Fig. 4 is a` fragmentary plan view ot a modified form of interchangeable head.

Fig. 5 is a fragmentary' front elevation showing one of the operating'cams `inits fully retracted position and thearm'partiali ly swung back, and V j Fig. 'illustrates a. modiiicat-ion whereby both cams may be concurrently actuated to set the right and left hand beads simultaneously.

.Throughout the several figures of. theA drawings we'have employed the same character of reference toindicate similar parts.

The standard .10 is assumed to be bolted 7 securely 1n position upon the loor,.,past

which the cores 11 with theircarcasses 12 j are successively advanced for the operation of setting one or both ot the beads thereon. At the top of the standard an adjustable head 13 is iixedly mounted by bolts 13, and agauge 13 accurately indicates the correct positionl for setting the beads ot thediit'erent sizes of casings. `Aswill be. further eX- plained, these heads may be made interchangeable tor the purpose Otsetting beads of diii'erent contour or upon casings ot materially different shape or size. However, as it is essential that the beads. shall be aiiixed to the casings with lextreme exactness, lwe

have provideda head-capable of being ac4 curately gauged in position and `fxedly set tor the particular. size ot' casing to` be op- .i

erated upon.' n y At each side of the head there is provided a pivoted lever`ar1n.l4=,-`which maybe tree- 1y swungy upon its pivotal bolt- 15 so that its terminal bead-setting` roll 16 may be readily f engaged with'or disengaged from the inner *edge of the tlre. casing, as best indicated re- Nloo spectively in Figs. 3 and 5. lt will be observed that the particular form of lever arm shown in the drawings is bifurcated with upper and lower branches 14, 14 respectively extendingeinwardly from the body ot the arm at diierent angles. The upper .arm v 14 is provided with aguiding roll 17 with its axis set approximately vat an angle ol 45 withthat 'of the bead-setting roll 16.l

Speaking' a little more in detail 'asy to these two rolls which may be symmetrically duplicated upon both sides of the supporting head, it will be seen'upon-referring-to Fig. 3 that the bead-setting rolls 16 are contoured yaccurately to lit. the lower acesot theleea-ds 18. This contour is substantially. reversed in posi-tion with respect to the guiding rolls 17, which lare -superposed sothat the bead will be directed accurately into position within. the c'ontiiuredY groovey fof .the 'associat'ed bead-setting' roll Las: bestshown in Fig.2 .Y p

Pivoted at the frontlot the standard are two 'cam levers'19 respectively equipped with lrollers 19. The longer ends Iot theselevers are connected by rods 20 .with the respective foot levers 21 While lcoiled 4springs 2()i are tensioned to. retract the cani ylevers'- tq their dottedline positions ot 'Figtyl or the full line positionzshown in Fig-5. In this latter position it is quite obvious that the pivoted llevers may 4be freely swung past their respective cam levers so that alti-fst one and then the Yother maybe engaged and disengaged with the inner periphery of the tire casingaecOrdiDgly. It wisllbe .noted that merely for purposes fof-illustration fthe cam levers are lever arms '144.

shown in Figs. 1' and 2 in theirpositions for applying pressure to the: beaid-setting rolls thru the engagement olfthe rollers 1'9,.with

the dependinglugs 19 providedy upon 4the Normally the lever arms will be swung back approximately 'at right angles with their operative A positions so that the Acore kkand casing may be'ad'vanced to the position best shown inv Fig. 3, where-upon the V.werkman will placfethe iiexible'endless bead'flS with its bottom or' lower .tace vaccuratelyenibraced within the -groove-ettllie'right hand.y beadlsetting roll 16, while said bead is' sup-v ported in the guiding roll l17,'asl best shown in Fig. 2. `Preferably the"disengagedA portion of the bead is manu-ally held Iaway from rvthe casing as-tlie'worlnnan swings thelever arm into its Voperative-1. position 'and'eap-plies pressure thereto byI-means-'ot the foot leyer and its 'connected cam.v The' core beingY slowly rotated will permit fthe'beadJtobe accurately affixedl f-to' .the right' .hand inner edgeoic thecarcass, and with ;a few rotations ot said 4core the pbwertullydetlect'ed lever arm and bead-setting` :roll willvserve' jrinly to set the bead .in its 'proper position.

This powerful action also forces any air bubbles from between the cemented surfaces of the bead and carcass. Moreover it will be observed that the lever arm and beadsetting roll are so positioned that power is j applied-e at right angles to the engaged suraceofthefcarcass andcore so that there is no Vpossibility of displacing the bead in the quickly accomplished procedure just above indicated. Theleft han-'d 'bead lmay beapplied in `exactly 'the Asame way either upon thev same vmechanism or upon one vimmediately adjacent thereto, toV which the core Therefore the corresponding bead-setting' appliance would be reversely' arranged to .have the right hand arm *landr'ofll like the arm 22 androll 23, so that'each workman would vrespectix'zely apply .the leftV hand vand the right hand beadsv only.

As the workman .becomes `'skilled in the operation of our bead-setting appliance it is entirelyrpracticable still further to shorten the operation by having both beads'sct at the same time. This is accomplished -as abovey described, except that the workman will Vit'thefright andleft hand beads within .their respective symmetrical. rolls 116.A Upon manually swinging both lever arms 14.- i-nto their loperative position et Fig. y3, the

vconnected cams 19-are operated by fa. common actuatinglrod 24 lfirmly to press both ot lthe bead-setting trolls with their contained beads simultaneously against the carcass.

. Supported fas theyv are upon the highly etiicient, fang'ula-rlyv disposed guiding' rolls 17, both beads may thus be applied approximately in the .same 'length of time that either the rightor left handbead may be setoperation.v Y

- lVith theabove` described operation and 1nodi'tication,e`ach lever arm 14 preferably is provided with a spring l2tensionednormallyl to vthrow the v[levers into their retr-actedpositi'ons. Accordingly, upon their krelease from the actuating earns, the lever arneswill-befswung Vfree lfrom the casing and core, so 'thatYV the :"l'atter'lmay be. imme- `ldiately.advanced KVVfor the next step or operation.v

Further :changes and imod-ieations may readily be inadei-n .the construction herein-fv shown and described, and we do not wish'to thereby materially Aspeeding up the be understood as limiting our invention to the particular details herein set forth by way of example.

Having now described the preferred embodiment of our invention, we claim as new and desire to secure by Letters Patent, the following l. In a bead-setting appliance, the combination with a pivoted lever arm, of a. guiding roll and an associated bead-setting roll rotatably mounted thereon in position to be swung into engagement with the tire carcass, a cam member associated therewith to apply pressure to the bead, and means for actuating said member, substantially as set forth.

2. In a bead-setting appliance, vthe comi bination with a pivoted lever arm adapted to be swung into and out of operative position with respect to atire carcass, of a contoured bead-setting roll and a superposed guiding roll rotatably mounted at different angles on said arm respectively adapted for applying the bead and for supporting and guiding the bead into the contour of the setting roll, substantially as set forth.

3. In a bead-setting appliance, the combination with a fixed standard, of anadjustable head mounted thereon and equipped with an adjustment gauge and with a long pivoted arm adapted freely to swing out of and into position to engage the tire carcass; said arm terminally mounting a contoured head-setting roll and an associated guiding. roll, substantially-as set forth.

4. In a bead-setting appliance, the combination with a fixed standard, of opposing pivoted lever arms mounted thereon in position to be swung into and out of engagement with the inner periphery of a tire carcass,.a contoured bead-setting roll and a superposed guiding roll ro-tatably mounted at different angles on each arm, and means for applying inward pressure to the bead-setting roll, substantially as set forth.

5. A bead-setting mechanism, comprising a fixed standard, an interchangeable head having fixed positions of adjustment there-V on, an associated adjustment gauge therefor, an extended lever arm pivoted upon said head, a contoured bead-setting roll anda superposed guiding roll, rotatably mounted at different angles terminally on said arm and actuating means for applying pressure to the bead-setting roll, substantially as set` forth.

6. A bead-setting mechanism, comprising a fixed standard and an associated set of interchangeable heads therefor having predetermined positions for operating from the standard, an associated hgauge adapted to indicate the position of each head with respect to the standard; said heads each being equipped with a pivoted arm mounting a beadsetting roll, and a guide roll angularly disposed with respect thereto and means for forcibly pressing said roll and its contained bead against the tire carcass, substantially as set forth.

7. A bead-setting mechanism, comprising a bifurcated pivoted lever arm, a guide roll and a bead-setting roll respectively positioned upon said lever arm; the latter in position to be swung into engagement with the tire carcass, and means for applying pressure to the bead-setting roll, substantially asset forth.

8: A bead-setting mechanism, comprising a pivoted lever arm, a bead-setting roll terminally positioned thereon, a guide roll angularly positioned in advance of and associated with said bead-settingY roll,` whereby the bead is presented to the latter in propel' l relation for its attachment toi the carcass, and means for applying pressure to the beadsetting roll, substantially as setfo-rth.

In testimony whereof we do now aflix our signatures.

JOHN w. DIRKsoN. LEE E. cLousH, 

